what does come we bill it mean slang

The phrase "come we bill it" is not a widely recognized term in standard English and does not have a commonly agreed-upon meaning in a broad sense. It could be slang or jargon from a particular region, group, or subculture. The phrase as is does not provide enough context to deduce a precise meaning.

However, breaking down the phrase:

- "Come" could be an invitation or a call to join in an activity.
- "We" indicates a group activity or a shared action.
- "Bill it" may refer to the act of creating a bill or invoicing, but in a slang context, it could mean to create a smokeable roll of a substance such as tobacco or cannabis, which is also known as a 'billie' or 'spliff' in some slang.

So, if this phrase is being used in a context where people are gathering to share in smoking, it might mean "Let's roll it and smoke it together."

But without more context or knowing the specific subculture it is being used in, this is a best guess. If the phrase is being used in a formal context, it is best to ask for clarification from the person using it to understand their intended meaning.